Inverted spot-facer



May 22,1945. W,l w, Moms 2,376,446

Y NVERTED sPoT-FAcER- Filed Jan. 28, 1944 Inventar @MMM l/amy M5195 Patented May v22. 1945 INVERTED sro'iracER Wesley Wr Morris, Bellingham, `Wash., assigner of one-half to` Bellingham Iron Works, Inc., Bellingham, Wash., at corporation of Washing` ton Application January 2s, 1944, seri-ai No. 520,127

- f `4 Claims. (Cl. S30-11) This `invention relates tc an inverted spotk facer embodying a special adaptation and arrangement ofjcoacting elements to render it particularly useful in spot-facing the underside of heavy duty and unwieldy flanges and equally well adapted for use where` the surface to =be` acted on is virtually inaccessible and not `use of ordinaryA cutting tools. n Needless to say, I am aware that various types "of spot-facers have been patented and that some of these areon the market and in use, and so far `a`s"`I have'beeri able to ascertain these devices are often quite complicated and difficult ingthlernselves for expeditious handling and utility. 4.What

is more,` these devices, at least the oneswhich.

given t ready t have come to my attention, are correspondingly expensive and require the use of diicult to attach and detach cutting tools.

It follows that my primary aim is to generally improve upon known patented and marketed spot-facers by providing one which lends itself admirably Well for efficient and expedient use for so-called inverted work, the preferred embodiment being characterized by a conveniently fashioned tool holding slot, locking means in the form of a spring-released retainer pin, and readily available means for normally holding the Din in projected retention position against the tension of the automatic releasing spring. n

' Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawing.

In the drawing, wherein like numerals are employed to designate like parts throughout the same- Figure 1 is a view partly in section and partly in elevation of an inverted spot-facer constructed in accordance with the ideas and principles of this invention.

Figures 2 and 3 are sections on the lines 2-2 and 3 3, respectively, of Figure l, looking in the direction of the arrows.

Referring now to the drawing by distinguishing reference numerals it will be observed that the cylindrical stem or body 4 is provided with a tapered shank 5 and driving lug 6, which latter parts iit into a holding and operating chuck of appropriate construction (not shown). The opposite end of the shank 4 is provided with a bore centrally arranged and dening a socket l. At its inner end this bore communicates with a somewhat smaller transverse b'ore or passage 8. At the outer end there is a transverse slot 9 interseating the fbore and fashioned to accommodate the bladed cutter tool I0. Also at the outer end I provide screw-threads onone side of .said slot to accommodate a screw plug II. On the `opposite side of the Slot and in the socket proper I lplmfide` a screw-threaded` guide bushing I2 through and beyond which the detent end of the retainer pin I 3 projects. Thefcentral portion t ofthe cutter, tool `is provided with a depression forming-a keeper seat Il for thefdetent end of the retainer pin. At its inner endthe retainer pin isjprovided with an enlarged head I5v fitting snugly but slidably in the socket 'I,` the'extreme inner end of said head being of concave-convex confgurationjas at I6 and` this projecting into the'transverse bore 8 to function as ai cam. A coiled spring Ia is arranged inthe socket and surr'oundsth'e ster'nportion of the pin, the spring bearing at one end against the bushing IZand at its opposite end against the shoulder forming head I-5. pand and to force the head I6 into the bore 8 and to detach the detent from its keeper seat I4 in the cutter tool. t

The numeral I'I designates a manually manipulated release device, this being in the form of a substantially cylindrical rod memlber sliding snugly in and beyond opposite ends of the transverse adapter bore 8. This member isprovided at opposite ends with spherical or ball-heads I8 and I9 for convenient nger-grips. The intermediate underside of the rod I'I is provided with a tapered recess 2U which defines and functions as awedge, this to engage the cam Iii. It is ob'vious, therefore, that by pushing the device I'I in a direction from right to left in Figure 1, the wedge comes into play to force the retaining or locking pin I3 down into the keeper seat I4 to thus hold the cutter tool I0 in operative position. The return tension of the coil spring tends to hold the parts in this coacting retaining relationship. Then by forcing the device I1 in the opposite direction, that is, from left to right, s'uicient clearance between the wedge 2|! and the cam I6 is provided to allow the spring to function.

It is evident that the cutter tool Ill is removed, to start with, in order -to pass the body 4 of the tool holder through the aperture in the work A. Then the cutter tool is inserted and fastened in place by the retaining means just described after which the protruding portion B can `be spot-faced. This accounts for the so-called inverted spot-facing feature.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with The tendency of the spring is to err-` the drawing. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement of details coming within the eld of invention claimed may be resorted to in actual practice, if desired.

Having described the invention, what is claimed as new is: j i

l. In an inverted spot-facer of the class described, a body including a tapered chuck shank `at one end, the opposite portion of the body constituting a stem and having a transverse 'slot therein to accommodate a quick insertable and removable cutter tool, a retaining pin slidably mounted in said stern and engageable with said cutter tool resilient means biasing said pin away from said cutter tool, and a wedge slidably mountf ed in said stem and engageable with said pin to move the same against the pressure of said resilient means. a

2. An inverted spot-facer of the class described comprising a body having an opening therein and having chuck accommodation means at one end and a slot at the opposite end, a removable cutter tool in said slot, a second slot in the intermediate portion of the body, a spring, a retaining pin adapted to be returned by said spring slidably mounted in said opening the body between the slots', the detent end of said pin projecting into the cutter slot, the opposite end of the pin projecting into the second-named slot,

a manually manipulated wedge slidable in said last-named slot and engageable with the adjacent end of said pin. l

3. In an inverted spot-facer of the class de- `ing a cam engageable with said wedge surscribed, a body provided with transverse slots parallel to one another and at longitudinally spaced points, a bore intersecting and communieating at its opposite ends with the respective slots, a headed retainer pin slidably mounted in said body, a coiled spring in the bore surrounding the pin and engaging the head, and a pin actuating and holding device slidable in one of the transverse slots, this being in the form of a cylindrical rod having ball-heads at opposite ends having its intermediate portion formed with a wedge surface, the head of the retainer pin havface.

4. An inverted spot-facer of the class described comprising a body including chuck engaging and driving means at one end, the opposite end being formed with a longitudinal centrally arranged bore, the outer end of the bore being threaded, a plug threaded in to said outer end, a transverse slot in the body intersecting the bore and adapted to accommodate a cutter tool, said bore being provided with a bushing, a retainer pin having its stem portion slidable through and beyond said bushing and into the slot, the pin at the opposite end having a cam-equipped head, a coiled spring in the bore surrounding the stem and engaging the bushing at one end and the head at the opposite end, said body having a second transverse slot, the inner end of said bore communicating with said second slot, a cylindrical member slidable in said second bore and provided with a wedge engageable with the head, and finger-gripping elements at opposite ends.

WESLEY W. MORRIS. 

